Date: Fri, 19 May 2000 13:29:12 -0400 From: Chip Marshall <chip@setzer.chocobo.cx> To: freebsd-small@freebsd.org Subject: RS-485 on a PCM-4823 Message-ID: <20000519132912.A74009@setzer.chocobo.cx>
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I've got an Advantech PCM-4823 (single board computer with ethernet, VGA, IDE, 486 etc) running FreeBSD 4.0-RELEASE, and am trying to use the boards second serial port in RS-485 mode. Everything works fine if I use one of the RS-232 ports with an RS-485 adapter connected to it, but when I try to use the built in 485, nothing seems to get received, but transmission works fine (I can see it from the other end.) After a while, the kernel starts complaining on the console about /kernel: sio1: 1069 more tty-level buffer overflows (total 3735) and continues doing this for a little while, ending with a total of 12567 buffer overflows. Anyone using RS-485 successfully or have any idea what I'm doing wrong? Thanks in advance. -- Chip Marshall <chip@chocobo.cx> http://www.chocobo.cx/chip/ Finger for PGP GCM/CS d+(-) s+:++ a18>? C++ UB++++$ P+++$ L- E--- W++ N+@ o K- w O M+ V-- PS PE Y? PGP++ t+@ 5 X R>+ tv+() b++>+++ DI++++ D(-) G++ e>++ h!>++ r-- y- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-small" in the body of the message
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